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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

N3OS callsign genealogy

Currently held by SIMILA, OIVA A

The FCC publishes a previous_call_sign on every amateur license — a self-link to the licensee's prior callsign. Following those links produces the chain below.

Previous callsigns

Older callsigns held by N3OS's current licensee, walking backwards.

  1. W3GDMcancelled· E
    MENTRO SR, GARY DFLgranted 2000-02-11cancelled 2008-03-28
  2. WB3JRWcancelled· A
    MENTRO SR, GARY DVAgranted 1999-04-06cancelled 2000-02-11

Successor callsigns

Callsigns held now by people who previously held N3OS.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign N3OS, oldest first.

  • SIMILA, OIVA A VA
    2002-07-23 → cancelled 2006-01-04
  • MENTRO SR, GARY D PA
    2018-01-03 active
← Back to N3OS License history →